If the developer task is really so trivial why not just have a human write actual code?

And even if it is actual code instead of a Rube Goldberg-esque restricted query service, I still don't think there's ever any time saved using AI for anything. Unless you also plan on assigning the code review to the AI, a human must be involved. To say that the reviews would be tedious is an understatement. Even the most junior developer is far more likely to comprehend their bug and fix it correctly. The AI is just going to keep hallucinating non-existent APIs, haphazardly breaking linter rules, and writing in plagiarized anti-patterns.